Techniques in polarization physics.- Theory of polarization measurements. Observables, amplitudes and symmetries.- The nucleon-nucleon force.- Hyperfine interaction and polarization.- Remarks on the organization of the material and the division of subject matter.- Resonances, poles, and polarization.- Isobaric analog resonances.- Fine structure of isobaric analog resonances and polarization.- Direct interaction.- Polarization phenomena in inelastic scattering.